Question:

$\sqrt{0.4}$ is a/an

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The square root of a non-perfect square rational number is always irrational.
Updated On: May 20, 2025
  • natural number
  • integer
  • rational number
  • irrational number
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The Correct Option is D

Solution and Explanation

$\sqrt{0.4} = \sqrt{\dfrac{2}{5}} = \dfrac{\sqrt{2}}{\sqrt{5}}$, which is an irrational number because it cannot be expressed as a ratio of two integers.
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